This page is for Brightspeed modems that look like this:
Applies to the following models:
Axon C4000BG * C4000LG * C4000XG * Zyxel C4000BZ * C4000LZ
Not the right kind of modem? Try the tower modem guide instead.
There are two models under the C4000 series modem/WiFi router, each one having different specifications. The one you use depends on the type of internet service you have.
Regardless of the specific model, the status LED ring on the front of the modem will function in the same way. This single status light replaces the multiple lights (Ethernet, Internet, WAN, etc.) found on earlier modems. If you have a C4000BG/BZ or LG/LZ model, you will also see a DSL status light on the back of the modem.
View the Axon / Greenwave C4000 user guide (for models BG, LG and XG)
View the Zyxel C4000 user guide (for models BZ and LZ)
The status light ring may change colors repeatedly as it goes through the initial installation process.
During the initial boot up of C4000, the single status light will blink blue while it is looking for the Brightspeed network. It should turn solid BLUE once it has established connection.
Troubleshooting tip: If the light blinks blue for more than 5 minutes, check to make sure the green DSL cord is firmly plugged in to both the modem and the wall jack. If it blinks blue again for more than 5 minutes, service is not connected to that jack. Please try another jack or chat with us for further help.
After completing the syncing and setup process, the LED color will change to indicate the connection status:
The C4000BG/BZ and LG/LZ models also have one or two DSL status lights beneath the ports on the back side, as seen in the photo. These lights will flash red and green while the modem is syncing with the network.
The DSL light turns GREEN
The status light ring on the front will also display different behaviors at certain times, depending on the state of the modem. You will see it change when you are pairing a device to your WiFi network through WPS, as well as when the modem is updating its firmware.
If the main LED or DSL status light on your C4000 exhibits different behavior, or indicates a problem based on the guides above, then there may be an issue with the network or with your equipment. Here are some things to try:
If the problem continues, contact technical support for help.
View all Modem/Router topics
WiFi 6 is the next generation in-home WiFi technology, designed for the ever-increasing demand of connected homes and gigabit connections. Compared to WiFi 5, it delivers:
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